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(No Model.) 2 Sheets-Sheet 1. W. 0. GRAIN. STOP MOTION FOR ROTARYMACHINE PARTS. No. 489,849.

Patented Jan. 10, 1893.

WITNESSES! (No Model.) 2 Sheets-Sheet 2. W. 040RAIN. STOP MOTION FORROTARY MACHINE PARTS. No. 489,849.

Patented Jan. 10,1893.

QM E WITNESSES:

NITED 'ra'rns FFIQEQ WILLIAM O. GRAIN, OF BALTIMORE, MARYLAND, ASSIGNOROF TWO-THIRDS TO WISE BROS, OF SAME PLACE.

STOP-MOTION FOR ROTARY MACHINE PARTS.

SPECIFICATION forming part of Letters Patent No. 489,849, dated January10, 1893.

Application filed July 27,1892. Serial No. 441,390- (Ilo model.)

T on whom, it may concern.-

Be it known that I, WILLIAM O. GRAIN, a citizen of the United States,residing at Baltimore, in the State of Maryland, have invented certainnew and useful Improvements in Stop-Motions for Rotary Machine Parts, ofwhich the following is a specification.

This invention relates to a stop-motion for rotary machine-parts, andthe object is to im- IO prove upon the arrangement shown in my priorpatent No. 353,623, dated November 30, 1886,in so far as it relates to astop-motion,- by providing for the disconnection of the parts after onerotation although the treadle remains depressed, and also providing,means to prevent further rotation owing to the momentum acquired.

My invention is applicable to a large variety of machines where astamping or interzo mittent motion is used.

The invention is illustrated in the accompanying drawings, in which,

Figure 1 shows a side view of a button or eyelet attaching machine towhich my invention is applied; the illustration of this particularmachine simply serves to demonstrate the application of the inventionFig. 2 shows a side view of the machine parts where my invention isapplied; Fig. 3 shows a vertical 0 section on line 3 3 of Fig. 2 Fig.4is a detail view from the opposite side of the machine illustrating theconstruction and operation of a stop-piece5 Fig. 5 shows a detailperspective View of the retractor-bar; Fig. 6 shows a 3 5 detail faceview of a rotary head on the driveshaft; Fig. 7 shows a side view of astamping machine to which my invention is applied, the rotary part inwhich the sliding bolt is located and the driving pulley both beingremoved, and only indicated by broken lines; Fig. 8 shows an enlargedsection view of parts as they are arranged in this stamping machine;Fig. 9 shows a modified construction embodying my invention.

In Fig. 1 where the invention is shown applied to a button-attaching oreyelet machine, the letter, A, designates the fixed jaw of the machine;I), the movable jaw, and, c, the receptacle which contains the buttonsor eyelets. The movable jaw, b, is set in motion through a lever, cl,and a rod, 6, which connects the lever with the jaw. These partsrepresent an ordinary button-attaching machine, and are wellknown; theyare supported ona table, f. My invention is applied to the drivingmechanism which is connected with the said jaw-moving lever, cl, wherebypower may be used in the manner desired for intermittently operating themachine.

A shaft, G, below the table, f, is to be driven by steam or other power,and thereonis a circular head, H, fixed in any suitable manner so as torotate always when the shaft turns. One side of the head has a plainsurface provided with a concentric groove, 71, and stopblocks, h,fastened therein at diametrically opposite places.

An eccentric, I, is on the shaft, G, alongside of the rotary head, H,and is loose, so that the shaft may turn without moving the eccentric.The ring, 01, surrounds the eccentric and has a suitable rod, 7o, whichprojects upward. A trip-lever, L, has one end pivoted at, l, to anupright, m, or to any other stationary device, and the movable end ofsaid trip-lever is connected by a link, 'n, with the aforesaidjaw-moving lever, d, of the machine. The ,rod, 70, of the eccentric isconnected with the trip-lever,L. It will thus be seen that when theeccentric, I, turns it will impart an up-and-down movement to thetriplever, L, and this latter by means of the link,

a, will move the jaw, b, of the machine.

The eccentric, I, is provided with a springbolt, 0, which when projectedenters the 8 5 groove, 71, in the rotary head, H, and forms a connectiontherewith by coming against one of the stop-blocks, h, which will causethe eccentric to rotate with the head. When the eccentric, I, thusrotates it at once imparts 0 motion to the movable jaw, 19, of themachine through the connections shown and described.

A flat springp bears against the end of the bolt to project it and isfastened to one face of the eccentric; said-bolt has a square end, 5 0,to prevent it from turning. The bolt has a slot, 0 in the lower side,and a retractorbar, Q, fits through guide-pieces, g, on a bracket, Q,and has a shoe, 7', at the upper end with an inclined outer side, thesaid shoe roo fitting against a face of the eccentric and adapted toengage the slot in the bolt and hold the latter withdrawn or retractedand out of engagement with the rotary-head. A spring, 3, holds theretractor-bar up.

An operating lever, in the present instance in the form of a treadle, T,is pivoted at one end and held up by a spring j; this treadle has alongitudinal slot, 2?, and the lower end of the retractor-bar passesdown through this slot and at this part said bar has a bevelednotch,u,in one side. An angle-shaped latch, U, has positionlongitudinally in the slot and is pivoted to the treadle; one end ofthis angle-latch engages the notch, u, and is held in engagementtherewith by a spring, c, secured to the treadle. The opposite end ofthe angle-latch bears against a stop-shoulder, w, on a stationarydepending arm, V, secured to the bracket, Q; this arm may be arranged soas to be thrown out of engagement with the latch by pivoting it on apin,0c, and providing a locking-nut, ac, to fit another pin or screwwhich engages a notch, 03 in one side of the said arm, said locking nutto bind against the arm, V, and hold it rigid. 1 A pin, y, projects fromthe inner side of the retractor-bar toward one face of the eccentric,and a lug, z, is formed on that face of the eccentric, and projects tostop against the said pin as hereinafter explained.

From the foregoing description the opera tion of the device will beunderstood and is as follows;-The spring-boltis normally withheld fromthe rotary head by the shoe on the upper end of the retractor-bar, Q,engaging it, as shown in Fig. 3. Then it is desired to close the movablejaw, b, of the machine against the fixed jaw, A, the operators foot willdepress the treadle, T, which will lower the retractor-bar Q, andwithdraw its shoe from the slot in the spring-bolt. The latter will thenbe projected until its square pointend enters to groove Ct, of therotary head, whereupon the eccentric will turn and the trip-lever, L,will move the jaw, 79, of the machine. Itwill be seen the retractor-baris drawn and disengaged from the spring-bolt by moving the operatinglever or treadle, T, by reason of the engagement with said bar of theend of the latch, U. But the opposite end of said latch bears on thestop-shoulder, w, and hence as the lever or treadle is moved farther thelatch is disengaged from the retractor-bar, and the spring, .9, throwssaid bar again where its shoe, 0" will be in the path of the bolt, 0,and will engage and retract the same as the eccentric completes onerevolution. Of course the latch must not release the retractor-bar untilthe latter has released the bolt. It will now be seen that with thisimproved construction the eccentric will be disconnected from the rotaryhead after one revolution although the lever or treadle may remaindepressed. With the return of theretractor-bar, the pin, y, takesposition in the path of the lug, z, and serves to prevent furtherrotation of the eccentric owing to the momentum acquired in its onerevolution, by constituting a stop for said shoulder or lug to comeagainst. It will be seen the objects primarily set out are accomplishedby the construction described.

Figs. 7 and 8 illustrate the invention applied to a stamping machine.The arrangement of parts is substantially the same as in the otherfigures heretofore described, and the same letters of reference are onthem. In this case, the spring-bolt, 0, is in a circular head, I, whichis keyed on the shaft, G, and a continuously rotating driving pulley, H,is loose on said shaft. A hand-lever, T, carries the latch U whichengages the retractor-bar, Q. Broken lines show treadle connections. Itis obvious the result in the intermittent operation is the same.

Fig. 9 illustrates a'modification embodying my invention, in which thenotch, u, in the retractor-bar, Q, is engaged by a slidinglatch, U, hungon a pin, 2, which engages a slot, 3, in said latch, having an inclinedupper side 4. A spring, 5, is fastened to the latch and bears against astationary shoulder, 6, on the machine-standard, Q thereby holding thelatch against the retractor-bar.

Fig. 7 designates a rod connecting the latch with the operating lever.Upon drawing down the latch it will first pull down the retractor-barand then as the inclined side, 4, of its slot, 3, rides over the pin, 2,said latch will slide laterally and release the retractorbar, allowingit to return. Upon the release of the latch it will return intoengagement with the retractor-bar, its beveled edge, 8, riding over thelower end of said bar and the spring, 5, throwing it into the notch. Itwill be obvious this construction will also effect the objects primarilyset out.

It is obvious my invention is applicable to any machine Where such astop-motion is required.

It will be understood the button-attaching machine and stamping machineare shown simply for purposes of illustration.

My invention is applicable to a large variety of machines where astamping or intermittent motion is used, and two rotary parts areemployed and constructed for connection by means of a bolt attached toone of them.

It is evident my invention may be embodied in other forms than thosehere shown.

Having thus described my invention what I claim as new and desire tosecure by Letters- Patent is:

1. In a machine of the character described, the combination of acontinuously rotating part; aloose rotary part; a spring bolt carried byone of said rotary parts and adapted to make connection with the other;a sliding spring-held retractor-bar holding said bolt withdrawn andhaving a shoulder extending cross-wise of said bar; an operating lever;a latch carried by said operating lever and engaging the shoulder of thesaid retractor-bar;

IIO

and astop to throw said latch out of such engagement with the saidshoulder, for the purpose described.

2. In a machine of the character described, the combination of acontinuously rotating part; a loose rotary part; a spring bolt carriedby one of said rotary parts and adapted to make connection with theother; a sliding spring-held retractor-bar holding said bolt withdrawn;an operating lever; a latch carried by said operating lever and engagingthe said retractor-bar; and a stop to throw said latch out of suchengagement and movable ont of the path of the latch for the purposedescribed.

In testimony whereof I affix my signature in the presence of twowitnesses.

WM. 0. GRAIN.

Witnesses:

ROBERT W. HAYS, J NO. T. MADDOX.

